Sick of trying to figure out which pins are used by some obscure Arduino shield? Can’t tell whether two shields will be compatible with each other?

This shield database arose out of a discussion on the Arduino Forums about the need for a comprehensive online reference for shield pin assignments. It lists as many Arduino shields as I can find along with their pin usage, making it easy for you to determine if particular shields are compatible.

it’s more of a shield maker list. This makes it convenient to find info about a shield you’ve purchased.

But what if you haven’t bought a shield? let’s say you want a shield that will play back audio to a speaker. You would have to click on each maker and search manually to find all the shields that play audio.